The UDFRDR option is found on discs written with DirectCD (packet writing), not Easy CD Creator.
If you chose the option to close the disc(s) to ISO for reading on any computer, you would have used CD-R discs, as this option is not available on CD-RW discs.
If for some reason the files are not being read because they weren't closed to ISO properly, you still may be able to read the packet written format if a proper UDF reader is installed. You can get a UDF reader by going to UDF VOLUME READER
at the bottom of the page and clicking on the download link. You will have to register at Roxio to complete the download, but it's no big deal.
If the UDF reader doesn't solve your problem, I would try reading the discs with another CD-RW burner to see if that works.
I would also try reinstalling EZCD Creator 5 and make sure that DirectCD is installed. Open DirectCD and make sure that the disc(s) is(are) indeed closed to ISO. Let us know what DirectCD reports about the disc(s).